Breast Endothelial Cell Expression Patterns

ABSTRACT

To gain a better understanding of breast tumor angiogenesis, breast endothelial cells (ECs) were isolated and evaluated for gene expression patterns. When transcripts from breast ECs derived from normal and malignant breast tissues were compared, genes that were specifically elevated in tumor-associated breast endothelium were revealed. These results confirm that neoplastic and normal endothelium in human breast are distinct at the molecular level, and have significant implications for the development of anti-angiogenic therapies in the future.

TECHNICAL FIELD OF THE INVENTION

This invention is related to the area of angiogenesis and anti-angiogenesis. In particular, it relates to genes which are characteristically expressed in breast tumor endothelial cells.

BACKGROUND OF THE INVENTION

To date, global gene expression profiles from endothelial cell-specific populations is limited to normal and tumorigenic colon tissue [St Croix, 2000]. There is a need in the art for analysis of endothelial cells from other tissue, so that diagnostic and therapeutic agents for non-colonic tumors can be developed.

SUMMARY OF THE INVENTION

According to one embodiment of the invention a method is provided to aid in diagnosing breast tumors. An expression product (protein or RNA) of at least one gene in a first breast tissue sample suspected of being neoplastic is detected. The at least one gene is selected from the group consisting of hypothetical protein DKFZp434G171; heat shock 70 kDa protein 1A; jagged 1 (Alagille syndrome); cyclin-dependent kinase 3; 6-phosphogluconolactonase; likely homolog of rat and mouse retinoid-inducible serine carboxypeptidase; plasmalemma vesicle associated protein; NADH:ubiquinone oxidoreductase MLRQ subunit homolog; HIF-1 responsive RTP801; ribosomal protein L27; secreted protein, acidic, cysteine-rich (osteonectin); hexokinase 1; ribosomal protein L13a; collagen, type IV, alpha 1; insulin-like growth factor binding protein 7; collagen, type III, alpha 1 (Ehlers-Danlos syndrome type IV, autosomal dominant); heat shock 10 kDa protein 1 (chaperonin 10); calcium channel, voltage-dependent, alpha 1H subunit; CD9 antigen (p24); TEM17; TEM13, Thy-1 cell surface antigen; Tax interaction protein 1; dysferlin, limb girdle muscular dystrophy 2B (autosomal recessive); hypothetical protein MGC34648; putative translation initiation factor; insulin-like growth factor binding protein 4; matrix metalloproteinase 9 (gelatinase B, 92 kDa gelatinase, 92 kDa type IV collagenase); heterogeneous nuclear ribonucleoprotein R; bHLH factor Hes4; collagen, type VI, alpha 2; T-box 2; glyceraldehyde-3-phosphate dehydrogenase; G protein-coupled receptor 4; collagen, type I, alpha 1; ras-related C3 botulinum toxin substrate 1 (rho family, small GTP binding protein Rac1); ribosomal protein, large, P1; TEM10, COL1A2 involved in tissue remodeling; heat shock 70 kDa protein 8; KIAA0152 gene product; Ca2+-promoted Ras inactivator; serine/arginine repetitive matrix 2; hypoxia-inducible factor 1, alpha subunit (basic helix-loop-helix transcription factor); benzodiazapine receptor (peripheral); ectonucleoside triphosphate diphosphohydrolase 1; heparan sulfate proteoglycan 2 (perlecan); fibromodulin; hairy/enhancer-of-split related with YRPW motif 1; collagen, type V, alpha 3; hairy/enhancer-of-split related with YRPW motif-like; hypothetical protein MGC2731; amino-terminal enhancer of split; mitogen-activated protein kinase 9; regulator of G-protein signalling 5; prothymosin, alpha (gene sequence 28); tubulin, beta, 2; protease, serine, 23; hypothetical protein F1120898; calpain 1, (mu/I) large subunit; interferon, alpha-inducible protein (clone IFI-6-16); ESTs, Weakly similar to T25031 hypothetical protein T20D3.3—Caenorhabditis elegans [C. elegans]; major histocompatibility complex, class I, C; hypoxia up-regulated 1; complement component 4B; prefoldin 2; cytoskeleton-associated protein 1; Rho GTPase activating protein 4; Homo sapiens clone FLC1492 PRO3121 mRNA, complete cds; transducin-like enhancer of split 2 (E(sp1) homolog, Drosophila); ribosomal protein L37; hypothetical protein MGC4677; ESTs, Highly similar to MT1A_HUMAN METALLOTHIONEIN-IA (MT-1A) [H. sapiens]; TEM11, nidogen (enactin); guanine nucleotide binding protein (G protein), gamma 5; matrix Gla protein; heat shock 105kD; GNAS complex locus; Homo sapiens cDNA FLJ11658 fis, clone HEMBA1004577; H19, imprinted maternally expressed untranslated mR NA; protein tyrosine phosphatase type IVA, member 3; snail homolog 1 (Drosophila); integrin-binding sialoprotein (bone sialoprotein, bone sialoprotein II); tissue inhibitor of metalloproteinase 1 (erythroid potentiating activity, collagenase inhibitor); peptidylprolyl isomerase B (cyclophilin B); MARCKS-like protein; FAST kinase; protease, serine, 11 (IGF binding); beta-2-microglobulin; delta sleep inducing peptide, immunoreactor; collagen, type IV, alpha 2; immediate early response 3; cadherin 5, type 2, VE-cadherin (vascular epithelium); RGC32 protein; guanylate cyclase 1, soluble, beta 3; major histocompatibility complex, class I, B; ribonuclease, RNase A family, 1 (pancreatic); collagen, type XVIII, alpha 1; v-jun sarcoma virus 17 oncogene homolog (avian); Homo sapiens mRNA; cDNA DKFZp686G1610 (from clone DKFZp686G1610); nucleolin; lectin, galactoside-binding, soluble, 3 binding protein; Lysosomal-associated multispanning membrane protein-5; ribosomal protein S16; guanine nucleotide binding protein (G protein), gamma 12; serine (or cysteine) proteinase inhibitor, Glade E (nexin, plasminogen activator inhibitor type 1), member 1; biglycan; DnaJ (Hsp40) homolog, subfamily B, member 1; tumor rejection antigen (gp96) 1; interferon, alpha-inducible protein (clo ne IFI-15K); solute carrier family 21 (prostaglandin transporter), member 2; CD74 antigen (invariant polypeptide of major histocompatibility complex, class II antigen-associated); serum/glucocorticoid regulated kinase; mitogen-activated protein kinase; receptor (calcitonin) activity modifying protein 3; sema domain, immunoglobulin domain (Ig); benzodiazapine receptor (peripheral)—mitochondrial; Cl domain-containing phosphatase & tensin-like; and Notch homolog 3 (Drosophila). Expression of the at least one gene in the first breast tissue sample is compared to expression of the at least one gene in a second breast tissue sample which is normal. Increased expression of the at least one gene in the first breast endothelial tissue sample relative to the second tissue sample identifies the first breast tissue sample as likely to be neoplastic.

According to another embodiment of the invention a method is provided of treating a breast tumor. Cells of the breast tumor are contacted with an antibody. The antibody specifically binds to an extracellular epitope of a protein selected from the group consisting of benzodiazapine receptor (peripheral); cadherin 5, type 2, VE-cadherin (vascular epithelium); calcium channel, voltage-dependent, alpha 1H subunit; CD74 antigen (invariant polypeptide of major histocompatibility complex, class II antigen-associated); CD9 antigen (p24); dysferlin, limb girdle muscular dystrophy 2B (autosomal recessive); ectonucleoside triphosphate diphosphohydrolase 1; G protein-coupled receptor 4; hypothetical protein F1120898; hypoxia up-regulated 1; immediate early response 3; interferon, alpha-inducible protein (clone IFI-6-16); jagged 1 (Alagille syndrome); KIAA0152 gene product; Lysosomal-associated multispanning membrane protein-5; major histocompatibility complex, class I, B; major histocompatibility complex, class I, C; NADH:ubiquinone oxidoreductase MLRQ subunit homolog; Notch homolog 3 (Drosophila); plasmalemma vesicle associated protein; solute carrier family 21 (prostaglandin transporter), member 2; TEM13, Thy-1 cell surface antigen; receptor (calcitonin) activity modifying protein 3; sema domain, immunoglobulin domain (Ig); benzodiazapine receptor (peripheral)—mitochondrial; and TEM17. Immune destruction of cells of the breast tumor is thereby triggered.

According to still another embodiment of the invention a method is provided for identifying a test compound as a potential anti-cancer or anti-breast tumor drug. A test compound is contacted with a cell which expresses at least one gene selected from the group consisting of: hypothetical protein DKFZp434G171; heat shock 70 kDa protein 1A; jagged 1 (Alagille syndrome); cyclin-dependent kinase 3; 6-phosphogluconolactonase; likely homolog of rat and mouse retinoid-inducible serine carboxypeptidase; plasmalemma vesicle associated protein; NADH:ubiquinone oxidoreductase MLRQ subunit homolog; HIF-1 responsive RTP801; ribosomal protein L27; secreted protein, acidic, cysteine-rich (osteonectin); hexokinase 1; ribosomal protein L13a; collagen, type IV, alpha 1; insulin-like growth factor binding protein 7; collagen, type III, alpha 1 (Ehlers-Danlos syndrome type IV, autosomal dominant); heat shock 10 kDa protein 1 (chaperonin 10); calcium channel, voltage-dependent, alpha 1H subunit; CD9 antigen (p24); TEM17; TEM13, Thy-1 cell surface antigen; Tax interaction protein 1; dysferlin, limb girdle muscular dystrophy 2B (autosomal recessive); hypothetical protein MGC34648; putative translation initiation factor; insulin-like growth factor binding protein 4; matrix metalloproteinase 9 (gelatinase B, 92 kDa gelatinase, 92 kDa type IV collagenase); heterogeneous nuclear ribonucleoprotein R; bHLH factor Hes4; collagen, type VI, alpha 2; T-box 2; glyceraldehyde-3-phosphate dehydrogenase; G protein-coupled receptor 4; collagen, type I, alpha 1; ras-related C3 botulinum toxin substrate 1 (rho family, small GTP binding protein Rac1); ribosomal protein, large, P1; TEM10, COL1A2 involved in tissue remodeling; heat shock 70 kDa protein 8; KIAA0152 gene product; Ca2+-promoted Ras inactivator; serine/arginine repetitive matrix 2; hypoxia-inducible factor 1, alpha subunit (basic helix-loop-helix transcription factor); benzodiazapine receptor (peripheral); ectonucleoside triphosphate diphosphohydrolase 1; heparan sulfate proteoglycan 2 (perlecan); fibromodulin; hairy/enhancer-of-split related with YRPW motif 1; collagen, type V, alpha 3; hairy/enhancer-of-split related with YRPW motif-like; hypothetical protein MGC2731; amino-terminal enhancer of split; mitogen-activated protein kinase 9; regulator of G-protein signalling 5; prothymosin, alpha (gene sequence 28); tubulin, beta, 2; protease, serine, 23; hypothetical protein F1120898; calpain 1, (mu/I) large subunit; interferon, alpha-inducible protein (clone IFI-6-16); ESTs, Weakly similar to T25031 hypothetical protein T20D3.3—Caenorhabditis elegans [C. elegans]; major histocompatibility complex, class I, C; hypoxia up-regulated 1; complement component 4B; prefoldin 2; cytoskeleton-associated protein 1; Rho GTPase activating protein 4; Homo sapiens clone FLC1492 PRO3121 mRNA, complete cds; transducin-like enhancer of split 2 (E(sp1) homolog, Drosophila); ribosomal protein L37; hypothetical protein MGC4677; ESTs, Highly similar to MT1A_HUMAN METALLOTHIONEIN-IA (MT-1A) [H. sapiens]; TEM11, nidogen (enactin); guanine nucleotide binding protein (G protein), gamma 5; matrix Gla protein; heat shock 105kD; GNAS complex locus; Homo sapiens cDNA FLJ11658 fis, clone HEMBA1004577; H19, imprinted maternally expressed untranslated mR NA; protein tyrosine phosphatase type IVA, member 3; snail homolog 1 (Drosophila); integrin-binding sialoprotein (bone sialoprotein, bone sialoprotein II); tissue inhibitor of metalloproteinase 1 (erythroid potentiating activity, collagenase inhibitor); peptidylprolyl isomerase B (cyclophilin B); MARCKS-like protein; FAST kinase; protease, serine, 11 (IGF binding); beta-2-microglobulin; delta sleep inducing peptide, immunoreactor; collagen, type IV, alpha 2; immediate early response 3; cadherin 5, type 2, VE-cadherin (vascular epithelium); RGC32 protein; guanylate cyclase 1, soluble, beta 3; major histocompatibility complex, class I, B; ribonuclease, RNase A family, 1 (pancreatic); collagen, type XVIII, alpha 1; v-jun sarcoma virus 17 oncogene homolog (avian); Homo sapiens mRNA; cDNA DKFZp686G1610 (from clone DKFZp686G1610); nucleolin; lectin, galactoside-binding, soluble, 3 binding protein; Lysosomal-associated multispanning membrane protein-5; ribosomal protein S16; guanine nucleotide binding protein (G protein), gamma 12; serine (or cysteine) proteinase inhibitor, Glade E (nexin, plasminogen activator inhibitor type 1), member 1; biglycan; DnaJ (Hsp40) homolog, subfamily B, member 1; tumor rejection antigen (gp96) 1; interferon, alpha-inducible protein (clo ne IFI-15K); solute carrier family 21 (prostaglandin transporter), member 2; CD74 antigen (invariant polypeptide of major histocompatibility complex, class II antigen-associated); serum/glucocorticoid regulated kinase; mitogen-activated protein kinase; receptor (calcitonin) activity modifying protein 3; sema domain, immunoglobulin domain (Ig); benzodiazapine receptor (peripheral)—mitochondrial; Cl domain-containing phosphatase & tensin-like; and Notch homolog 3 (Drosophila). An expression product of the at least one gene is monitored. The test compound is identified as a potential anti-cancer drug if it decreases the expression of the at least one gene.

Still another embodiment of the invention is a method to induce an immune response to a breast tumor. A protein or nucleic acid encoding a protein is administered to a mammal, preferably a human. The protein is selected from the group consisting of: hypothetical protein DKFZp434G171; heat shock 70 kDa protein 1A; jagged 1 (Alagille syndrome); cyclin-dependent kinase 3; 6-phosphogluconolactonase; likely homolog of rat and mouse retinoid-inducible serine carboxypeptidase; plasmalemma vesicle associated protein; NADH:ubiquinone oxidoreductase MLRQ subunit homolog; HIF-1 responsive RTP801; ribosomal protein L27; secreted protein, acidic, cysteine-rich (osteonectin); hexokinase 1; ribosomal protein L13a; collagen, type IV, alpha 1; insulin-like growth factor binding protein 7; collagen, type III, alpha 1 (Ehlers-Danlos syndrome type IV, autosomal dominant); heat shock 10 kDa protein 1 (chaperonin 10); calcium channel, voltage-dependent, alpha 1H subunit; CD9 antigen (p24); TEM17; TEM13, Thy-1 cell surface antigen; Tax interaction protein 1; dysferlin, limb girdle muscular dystrophy 2B (autosomal recessive); hypothetical protein MGC34648; putative translation initiation factor; insulin-like growth factor binding protein 4; matrix metalloproteinase 9 (gelatinase B, 92 kDa gelatinase, 92 kDa type IV collagenase); heterogeneous nuclear ribonucleoprotein R; bHLH factor Hes4; collagen, type VI, alpha 2; T-box 2; glyceraldehyde-3-phosphate dehydrogenase; G protein-coupled receptor 4; collagen, type I, alpha 1; ras-related C3 botulinum toxin substrate 1 (rho family, small GTP binding protein Rac1); ribosomal protein, large, P1; TEM10, COL1A2 involved in tissue remodeling; heat shock 70 kDa protein 8; KIAA0152 gene product; Ca2+-promoted Ras inactivator; serine/arginine repetitive matrix 2; hypoxia-inducible factor 1, alpha subunit (basic helix-loop-helix transcription factor); benzodiazapine receptor (peripheral); ectonucleoside triphosphate diphosphohydrolase 1; heparan sulfate proteoglycan 2 (perlecan); fibromodulin; hairy/enhancer-of-split related with YRPW motif 1; collagen, type V, alpha 3; hairy/enhancer-of-split related with YRPW motif-like; hypothetical protein MGC2731; amino-terminal enhancer of split; mitogen-activated protein kinase 9; regulator of G-protein signalling 5; prothymosin, alpha (gene sequence 28); tubulin, beta, 2; protease, serine, 23; hypothetical protein F1120898; calpain 1, (mu/I) large subunit; interferon, alpha-inducible protein (clone IFI-6-16); ESTs, Weakly similar to T25031 hypothetical protein T20D3.3—Caenorhabditis elegans [C. elegans]; major histocompatibility complex, class I, C; hypoxia up-regulated 1; complement component 4B; prefoldin 2; cytoskeleton-associated protein 1; Rho GTPase activating protein 4; Homo sapiens clone FLC1492 PRO3121 mRNA, complete cds; transducin-like enhancer of split 2 (E(sp1) homolog, Drosophila); ribosomal protein L37; hypothetical protein MGC4677; ESTs, Highly similar to MT1A_HUMAN METALLOTHIONEIN-IA (MT-1A) [H. sapiens]; TEM11, nidogen (enactin); guanine nucleotide binding protein (G protein), gamma 5; matrix Gla protein; heat shock 105kD; GNAS complex locus; Homo sapiens cDNA FLJ11658 fis, clone HEMBA1004577; H19, imprinted maternally expressed untranslated mR NA; protein tyrosine phosphatase type IVA, member 3; snail homolog 1 (Drosophila); integrin-binding sialoprotein (bone sialoprotein, bone sialoprotein II); tissue inhibitor of metalloproteinase 1 (erythroid potentiating activity, collagenase inhibitor); peptidylprolyl isomerase B (cyclophilin B); MARCKS-like protein; FAST kinase; protease, serine, 11 (IGF binding); beta-2-microglobulin; delta sleep inducing peptide, immunoreactor; collagen, type IV, alpha 2; immediate early response 3; cadherin 5, type 2, VE-cadherin (vascular epithelium); RGC32 protein; guanylate cyclase 1, soluble, beta 3; major histocompatibility complex, class I, B; ribonuclease, RNase A family, 1 (pancreatic); collagen, type XVIII, alpha 1; v-jun sarcoma virus 17 oncogene homolog (avian); Homo sapiens mRNA; cDNA DKFZp686G1610 (from clone DKFZp686G1610); nucleolin; lectin, galactoside-binding, soluble, 3 binding protein; Lysosomal-associated multispanning membrane protein-5; ribosomal protein S16; guanine nucleotide binding protein (G protein), gamma 12; serine (or cysteine) proteinase inhibitor, Glade E (nexin, plasminogen activator inhibitor type 1), member 1; biglycan; DnaJ (Hsp40) homolog, subfamily B, member 1; tumor rejection antigen (gp96) 1; interferon, alpha-inducible protein (clo ne IFI-15K); solute carrier family 21 (prostaglandin transporter), member 2; CD74 antigen (invariant polypeptide of major histocompatibility complex, class II antigen-associated); serum/glucocorticoid regulated kinase; mitogen-activated protein kinase; receptor (calcitonin) activity modifying protein 3; sema domain, immunoglobulin domain (Ig); benzodiazapine receptor (peripheral)—mitochondrial; Cl domain-containing phosphatase & tensin-like; and Notch homolog 3 (Drosophila). An immune response to the protein is thereby induced.

The present invention thus provides the art with methods of diagnosing and treating breast tumors.

DETAILED DESCRIPTION OF THE INVENTION

Using SAGE (Serial Analysis of Gene Expression) profiling, the present inventors were able to identify previously unrecognized, angiogenesis-specific markers that discriminate between non-proliferative and pathologic endothelial cells. In addition, a set of previously identified angiogenesis-specific markers from other tumor types (colon and/or brain) were found to be expressed in breast tumor endothelium as well. We identified 111 human genes that were expressed at significantly higher levels in breast tumor endothelium than in normal breast endothelium. See Table 1. Additional such genes which can be used similarly to the 11 human genes are shown in Table 2. We have named these markers BEMs (breast tumor endothelial markers). BEMs that are expressed in both colon and breast tumor epithelium are identified in Table 3. BEMs that are expressed in both brain and breast tumor epithelium are identified in Table 4. BEMs that are expressed in each of brain, colon, and breast tumor epithelium are identified in Table 5.

TABLE 1 111 Breast Markers Unigene ID Function OMIMID Protein Hs.8728 hypothetical protein CAB61365 DKFZp434G171 Hs.8997 heat shock 70 kDa protein 1A 140550 NP_005336 Hs.91143 jagged 1 (Alagille syndrome) 601920 NP_000205 Hs.100009 cyclin-dependent kinase 3 123828 Hs.100071 6-phosphogluconolactonase 604951 NP_036220 Hs.106747 likely homolog of rat and NP_067639 mouse retinoid-inducible serine carboxypeptidase Hs.107125 plasmalemma vesicle NP_112600 associated protein Hs.110024 NADH: ubiquinone NP_064527 oxidoreductase MLRQ subunit homolog Hs.111244 HIF-1 responsive RTP801 NP_061931 Hs.111611 ribosomal protein L27 607526 NP_000979 Hs.111779 secreted protein, acidic, 182120 NP_003109 cysteine-rich (osteonectin) Hs.118625 hexokinase 1 142600 NP_277035 Hs.119122 ribosomal protein L13a Hs.119129 collagen, type IV, alpha 1 120130 NP_001836 Hs.119206 insulin-like growth factor 602867 NP_001544 binding protein 7 Hs.119571 collagen, type III, alpha 1 120180 NP_000081 (Ehlers-Danlos syndrome type IV, autosomal dominant) Hs.1197 heat shock 10 kDa protein 1 600141 NP_002148 (chaperonin 10) Hs.122359 calcium channel, voltage- NP_066921 dependent, alpha 1H subunit Hs.1244 CD9 antigen (p24) 143030 NP_001760 Hs.125036 TEM17 606826 NP_065138 Hs.125359 TEM13, Thy-1 cell surface 188230 NP_006279 antigen Hs.12956 Tax interaction protein 1 NP_055419 Hs.143897 dysferlin, limb girdle 603009 NP_003485 muscular dystrophy 2B (autosomal recessive) Hs.146360 hypothetical protein MGC34648 NP_689873 Hs.150580 putative translation NP_005792 initiation factor Hs.1516 insulin-like growth factor 146733 NP_001543 binding protein 4 Hs.151738 matrix metalloproteinase 9 120361 NP_004985 (gelatinase B, 92 kDa gelatinase, 92 kDa type IV collagenase) Hs.15265 heterogeneous nuclear 607201 NP_005817 ribonucleoprotein R Hs.154029 bHLH factor Hes4 NP_066993 Hs.159263 collagen, type VI, alpha 2 120240 NP_001840 Hs.168357 T-box 2 600747 NP_005985 Hs.169476 glyceraldehyde-3-phosphate 138400 NP_002037 dehydrogenase Hs.17170 G protein-coupled receptor 4 600551 NP_005273 Hs.172928 collagen, type I, alpha 1 120150 NP_000079 Hs.173737 ras-related C3 botulinum 602048 toxin substrate 1 (rho family, small GTP binding protein Rac1) Hs.177592 ribosomal protein, large, P1 180520 Hs.179573 TEM10, COL1A2 involved in 120160 NP_000080 tissue remodeling Hs.180414 heat shock 70 kDa protein 8 600816 NP_006588 Hs.181418 KIAA0152 gene product NP_055545 Hs.184367 Ca2+-promoted Ras BAA25464 inactivator Hs.197114 serine/arginine repetitive 606032 NP_057417 matrix 2 Hs.197540 hypoxia-inducible factor 1, 603348 NP_001521 alpha subunit (basic helix- loop-helix transcription factor) Hs.202 benzodiazapine receptor 109610 NP_000705 (peripheral) Hs.205353 ectonucleoside triphosphate 601752 NP_001767 diphosphohydrolase 1 Hs.211573 heparan sulfate proteoglycan 142461 NP_005520 2 (perlecan) Hs.230 Fibromodulin 600245 NP_002014 Hs.234434 hairy/enhancer-of-split 602953 NP_036390 related with YRPW motif 1 Hs.235368 collagen, type V, alpha 3 120216 NP_056534 Hs.23823 hairy/enhancer-of-split NP_055386 related with YRPW motif-like Hs.240170 hypothetical protein MGC2731 NP_076973 Hs.244 amino-terminal enhancer of 600188 split Hs.246857 mitogen-activated protein 602896 NP_620708 kinase 9 Hs.24950 regulator of G-protein 603276 NP_003608 signalling 5 Hs.250655 prothymosin, alpha (gene 188390 NP_002814 sequence 28) Hs.251653 tubulin, beta, 2 602660 NP_006079 Hs.25338 protease, serine, 23 Hs.25549 hypothetical protein FLJ20898 NP_078876 Hs.2575 calpain 1, (mu/l) large 114220 NP_005177 subunit Hs.265827 interferon, alpha-inducible 147572 NP_075011 protein (clone IFI-6-16) Hs.267200 ESTs, Weakly similar to T25031 hypothetical protein T20D3.3 - Caenorhabditis elegans [C. elegans] Hs.277477 major histocompatibility 142840 NP_002108 complex, class I, C Hs.277704 hypoxia up-regulated 1 601746 NP_006380 Hs.278625 complement component 4B 120820 NP_000583 Hs.298229 prefoldin 2 NP_036526 Hs.31053 cytoskeleton-associated 601303 NP_001272 protein 1 Hs.3109 Rho GTPase activating 300023 NP_001657 protein 4 Hs.327412 Homo sapiens clone FLC1492 PRO3121 mRNA, complete cds Hs.332173 transducin-like enhancer of 601041 NP_003251 split 2 (E(sp1) homolog, Drosophila) Hs.337445 ribosomal protein L37 604181 NP_000988 Hs.337986 hypothetical protein MGC4677 NP_443103 Hs.353882 ESTs, Highly similar to MT1A_HUMAN METALLOTHIONEIN-IA (MT-1A) [H. sapiens] Hs.356624 TEM11, nidogen (enactin) 131390 NP_002499 Hs.356668 guanine nucleotide binding 600874 NP_005265 protein (G protein), gamma 5 Hs.365706 matrix Gla protein 154870 NP_000891 Hs.36927 heat shock 105 Kd NP_006635 Hs.374523 GNAS complex locus 139320 NP_536350 Hs.380824 Homo sapiens cDNA FLJ11658 fis, clone HEMBA1004577 Hs.406410 H19, imprinted maternally 103280 BAB71280 expressed untranslated mRNA Hs.43666 protein tyrosine phosphatase 606449 NP_116000 type IVA, member 3 Hs.48029 snail homolog 1 (Drosophila) 604238 NP_005976 Hs.49215 integrin-binding sialoprotein 147563 NP_004958 (bone sialoprotein, bone sialoprotein II) Hs.5831 tissue inhibitor of 305370 NP_003245 metalloproteinase 1 (erythroid potentiating activity, collagenase inhibitor) Hs.699 peptidylprolyl isomerase B 123841 NP_000933 (cyclophilin B) Hs.75061 MARCKS-like protein 602940 NP_075385 Hs.75087 FAST kinase 606965 NP_079372 Hs.75111 protease, serine, 11 (IGF 602194 NP_002766 binding) Hs.75415 beta-2-microglobulin 109700 NP_004039 Hs.75450 delta sleep inducing peptide, 602960 immunoreactor Hs.75617 collagen, type IV, alpha 2 120090 NP_001837 Hs.76095 immediate early response 3 602996 NP_434702 Hs.76206 cadherin 5, type 2, VE-cadherin 601120 NP_001786 (vascular epithelium) Hs.76640 RGC32 protein Hs.77890 guanylate cyclase 1, soluble, 139397 NP_000848 beta 3 Hs.77961 major histocompatibility 142830 NP_005505 complex, class I, B Hs.78224 ribonuclease, RNase A family, 180440 AAH05324 1 (pancreatic) Hs.78409 collagen, type XVIII, alpha 1 120328 NP_085059 Hs.78465 v-jun sarcoma virus 17 165160 NP_002219 oncogene homolog (avian) Hs.7869 Homo sapiens mRNA; cDNA DKFZp686G1610 (from clone DKFZp686G1610) Hs.79110 Nucleolin 164035 NP_005372 Hs.79339 lectin, galactoside-binding, 600626 NP_005558 soluble, 3 binding protein Hs.79356 Lysosomal-associated 601476 NP_006753 multispanning membrane protein-5 Hs.80617 ribosomal protein S16 603675 Hs.8107 guanine nucleotide binding protein (G protein), gamma 12 Hs.82085 serine (or cysteine) 173360 NP_000593 proteinase inhibitor, clade E (nexin, plasminogen activator inhibitor type 1), member 1 Hs.821 Biglycan 301870 NP_001702 Hs.82646 DnaJ (Hsp40) homolog, 604572 NP_006136 subfamily B, member 1 Hs.82689 tumor rejection antigen 191175 NP_003290 (gp96) 1 Hs.833 interferon, alpha-inducible 147571 NP_005092 protein (clone IFI-15K) Hs.83974 solute carrier family 21 601460 NP_005621 (prostaglandin transporter), member 2 Hs.84298 CD74 antigen (invariant 142790 NP_004346 polypeptide of major histocompatibility complex, class II antigen-associated) Hs.8546 Notch homolog 3 (Drosophila) 600276 NP_000426

TABLE 2 Additional Tumor Endothelial Markers in Breast Unigene ID Function OMIMID Protein Hs.296323 serum/glucocorticoid regulated 602958 NP_005618 kinase Hs.246857 mitogen-activated protein 602896 NP_620708 kinase Hs.25691 receptor (calcitonin) activity 605155 NP_005847 modifying protein 3 Hs.9598 sema domain, immunoglobulin — BAB21836 domain (Ig) Hs.202 benzodiazapine receptor 109610 NP_000715 (peripheral) - mitochondrial Hs.6147 C1 domain-containing — NP_056134 phosphatase & tensin-like

TABLE 3 Markers in Colon and Breast Tumor Epithelium Unigene ID Function OMIMID Protein Hs.8997 heat shock 70 kDa protein 1A 140550 NP_005336 Hs.110024 NADH: ubiquinone NP_064527 oxidoreductase MLRQ subunit homolog Hs.111779 secreted protein, acidic, 182120 NP_003109 cysteine-rich (osteonectin) Hs.119129 collagen, type IV, alpha 1 120130 NP_001836 Hs.119206 insulin-like growth factor 602867 NP_001544 binding protein 7 Hs.119571 collagen, type III, alpha 1 120180 NP_000081 (Ehlers-Danlos syndrome type IV, autosomal dominant) Hs.1197 heat shock 10 kDa protein 1 600141 NP_002148 (chaperonin 10) Hs.125036 TEM17 606826 NP_065138 Hs.125359 TEM13, Thy-1 cell surface 188230 NP_006279 antigen Hs.151738 matrix metalloproteinase 9 120361 NP_004985 (gelatinase B, 92 kDa gelatinase, 92 kDa type IV collagenase) Hs.159263 collagen, type VI, alpha 2 120240 NP_001840 Hs.168357 T-box 2 600747 NP_005985 Hs.172928 collagen, type I, alpha 1 120150 NP_000079 Hs.179573 TEM10, COL1A2 involved in 120160 NP_000080 tissue remodeling Hs.230 Fibromodulin 600245 NP_002014 Hs.23823 hairy/enhancer-of-split NP_055386 related with YRPW motif-like Hs.24950 regulator of G-protein 603276 NP_003608 signalling 5 Hs.265827 interferon, alpha-inducible 147572 NP_075011 protein (clone IFI-6-16) Hs.327412 Homo sapiens clone FLC1492 PRO3121 mRNA, complete cds Hs.337986 hypothetical protein NP_443103 MGC4677 Hs.356624 TEM11, nidogen (enactin) 131390 NP_002499 Hs.36927 heat shock 105 kD NP_006635 Hs.43666 protein tyrosine phosphatase 606449 NP_116000 type IVA, member 3 Hs.5831 tissue inhibitor of 305370 NP_003245 metalloproteinase 1 (erythroid potentiating activity, collagenase inhibitor) Hs.699 peptidylprolyl isomerase B 123841 NP_000933 (cyclophilin B) Hs.75617 collagen, type IV, alpha 2 120090 NP_001837 Hs.77890 guanylate cyclase 1, 139397 NP_000848 soluble, beta 3 Hs.78409 collagen, type XVIII, 120328 NP_085059 alpha 1 Hs.78465 v-jun sarcoma virus 17 165160 NP_002219 oncogene homolog (avian) Hs.821 Biglycan 301870 NP_001702 Hs.82646 DnaJ (Hsp40) homolog, 604572 NP_006136 subfamily B, member 1 Hs.8546 Notch homolog 3 (Drosophila) 600276 NP_000426

TABLE 4 Markers in Brain and Breast Tumor Epithelium Unigene ID Function OMIMID Protein Hs.107125 plasmalemma vesicle associated NP_112600 protein Hs.111611 ribosomal protein L27 607526 NP_000979 Hs.111779 Secreted protein, acidic, 182120 NP_003109 cysteine-rich (osteonectin) Hs.119129 Collagen, type IV, alpha 1 120130 NP_001836 Hs.119571 Collagen, type III, alpha 1 120180 NP_000081 (Ehlers-Danlos syndrome type IV, autosomal dominant) Hs.125359 TEM13, Thy-1 cell surface 188230 NP_006279 antigen Hs.143897 Dysferlin, limb girdle 603009 NP_003485 muscular dystrophy 2B (autosomal recessive) Hs.151738 matrix metalloproteinase 9 120361 NP_004985 (gelatinase B, 92 kDa gelatinase, 92 kDa type IV collagenase) Hs.159263 Collagen, type VI, alpha 2 120240 NP_001840 Hs.172928 Collagen, type I, alpha 1 120150 NP_000079 Hs.179573 TEM10, COL1A2 involved in 120160 NP_000080 tissue remodeling Hs.211573 Heparan sulfate proteoglycan 2 142461 NP_005520 (perlecan) Hs.277477 major histocompatibility 142840 NP_002108 complex, class I, C Hs.327412 Homo sapiens clone FLC1492 PRO3121 mRNA, complete cds Hs.332173 transducin-like enhancer of 601041 NP_003251 split 2 (E(sp1) homolog, Drosophila) Hs.337986 hypothetical protein MGC4677 NP_443103 Hs.365706 matrix Gla protein 154870 NP_000891 Hs.75061 MARCKS-like protein 602940 NP_075385 Hs.75111 Protease, serine, 11 (IGF 602194 NP_002766 binding) Hs.75617 collagen, type IV, alpha 2 120090 NP_001837 Hs.77961 major histocompatibility 142830 NP_005505 complex, class I, B Hs.79356 Lysosomal-associated 601476 NP_006753 multispanning membrane protein-5 Hs.82085 serine (or cysteine) 173360 NP_000593 proteinase inhibitor, clade E (nexin, plasminogen activator inhibitor type 1), member 1 Hs.821 Biglycan 301870 NP_001702

TABLE 5 Breast, Brain, and Colon Tumor Endothelial Markers Unigene ID Function OMIMID Protein Hs.111779 secreted protein, acidic, 182120 NP_003109 cysteine-rich (osteonectin) Hs.119129 collagen, type IV, alpha 1 120130 NP_001836 Hs.119571 collagen, type III, alpha 1 120180 NP_000081 (Ehlers-Danlos syndrome type IV, autosomal dominant) Hs.125359 TEM13, Thy-1 cell surface 188230 NP_006279 antigen Hs.151738 matrix metalloproteinase 9 120361 NP_004985 (gelatinase B, 92 kDa gelatinase, 92 kDa type IV collagenase) Hs.159263 collagen, type VI, alpha 2 120240 NP_001840 Hs.172928 collagen, type I, alpha 1 120150 NP_000079 Hs.179573 TEM10, COL1A2 involved in 120160 NP_000080 tissue remodeling Hs.327412 Homo sapiens clone FLC1492 PRO3121 mRNA, complete cds Hs.337986 hypothetical protein NP_443103 MGC4677 Hs.75617 collagen, type IV, alpha 2 120090 NP_001837 Hs.821 biglycan 301870 NP_001702

Endothelial cells (ECs) represent only a minor fraction of the total cells within normal or tumor tissues, and only those EC transcripts expressed at the highest levels would be expected to be represented in libraries constructed from unfractionated tissues. The genes described in the current study should therefore provide a valuable resource for basic and clinical studies of human breast angiogenesis in the future.

Isolated and purified nucleic acids, according to the present invention are those which are not linked to those genes to which they are linked in the human genome. Moreover, they are not present in a mixture such as a library containing a multitude of distinct sequences from distinct genes. They may be, however, linked to other genes such as vector sequences or sequences of other genes to which they are not naturally adjacent.

The nucleic acids may represent either the sense or the anti-sense strand. Nucleic acids and proteins although disclosed herein with sequence particularity, may be derived from a single individual. Allelic variants which occur in the population of humans are included within the scope of such nucleic acids and proteins. Those of skill in the art are well able to identify allelic variants as being the same gene or protein. Given a nucleic acid, one of ordinary skill in the art can readily determine an open reading frame present, and consequently the sequence of a polypeptide encoded by the open reading frame and, using techniques well known in the art, express such protein in a suitable host. Proteins comprising such polypeptides can be the naturally occurring proteins, fusion proteins comprising exogenous sequences from other genes from humans or other species, epitope tagged polypeptides, etc. Isolated and purified proteins are not in a cell, and are separated from the normal cellular constituents, such as nucleic acids, lipids, etc. Typically the protein is purified to such an extent that it comprises the predominant species of protein in the composition, such as greater than 50, 60 70, 80, 90, or even 95% of the proteins present.

Using the proteins according to the invention, one of ordinary skill in the art can readily generate antibodies which specifically bind to the proteins. Such antibodies can be monoclonal or polyclonal. They can be chimeric, humanized, or totally human. Any functional fragment or derivative of an antibody can be used including Fab, Fab′, Fab2, Fab′2, and single chain variable regions. So long as the fragment or derivative retains specificity of binding for the endothelial marker protein it can be used. Antibodies can be tested for specificity of binding by comparing binding to appropriate antigen to binding to irrelevant antigen or antigen mixture under a given set of conditions. If the antibody binds to the appropriate antigen at least 2, 5, 7, and preferably 10 times more than to irrelevant antigen or antigen mixture then it is considered to be specific.

Techniques for making such partially to fully human antibodies are known in the art and any such techniques can be used. According to one particularly preferred embodiment, fully human antibody sequences are made in a transgenic mouse which has been engineered to express human heavy and light chain antibody genes. Multiple strains of such transgenic mice have been made which can produce different classes of antibodies. B cells from transgenic mice which are producing a desirable antibody can be fused to make hybridoma cell lines for continuous production of the desired antibody. See for example, Nina D. Russel, Jose R. F. Corvalan, Michael L. Gallo, C. Geoffrey Davis, Liise-Anne Pirofski. Production of Protective Human Antipneumococcal Antibodies by Transgenic Mice with Human Immunoglobulin Loci Infection and Immunity April 2000, p. 1820-1826; Michael L. Gallo, Vladimir E. Ivanov, Aya Jakobovits, and C. Geoffrey Davis. The human immunoglobulin loci introduced into mice: V (D) and J gene segment usage similar to that of adult humans European Journal of Immunology 30: 534-540, 2000; Larry L. Green. Antibody engineering via genetic engineering of the mouse: XenoMouse strains are a vehicle for the facile generation of therapeutic human monoclonal antibodies Journal of Immunological Methods 231 11-23, 1999; Yang X-D, Corvalan JRF, Wang P, Roy CM-N and Davis CG. Fully Human Anti-interleukin-8 Monoclonal Antibodies: Potential Therapeutics for the Treatment of Inflammatory Disease States. Journal of Leukocyte Biology Vol. 66, pp 401-410 (1999); Yang X-D, Jia X-C, Corvalan JRF, Wang P, CG Davis and Jakobovits A. Eradication of Established Tumors by a Fully Human Monoclonal Antibody to the Epidermal Growth Factor Receptor without Concomitant Chemotherapy. Cancer Research Vol. 59, Number 6, pp 1236-1243 (1999); Jakobovits A. Production and selection of antigen-specific fully human monoclonal antibodies from mice engineered with human Ig loci. Advanced Drug Delivery Reviews Vol. 31, pp: 33-42 (1998); Green L and Jakobovits A. Regulation of B cell development by variable gene complexity in mice reconstituted with human immunoglobulin yeast artificial chromosomes. J. Exp. Med. Vol. 188, Number 3, pp: 483-495 (1998); Jakobovits A. The long-awaited magic bullets: therapeutic human monoclonal antibodies from transgenic mice. Exp. Opin. Invest. Drugs Vol. 7(4), pp: 607-614 (1998); Tsuda H, Maynard-Currie K, Reid L, Yoshida T, Edamura K, Maeda N, Smithies O, Jakobovits A. Inactivation of Mouse HPRT locus by a 203-bp retrotransposon insertion and a 55-kb gene-targeted deletion: establishment of new HPRT-Deficient mouse embryonic sBEM cell lines. Genomics Vol. 42, pp: 413-421 (1997); Sherman-Gold, R. Monoclonal Antibodies: The Evolution from '80s Magic Bullets To Mature, Mainstream Applications as Clinical Therapeutics. Genetic Engineering News Vol. 17, Number 14 (August 1997); Mendez M, Green L, Corvalan J, Jia X-C, Maynard-Currie C, Yang X-d, Gallo M, Louie D, Lee D, Erickson K, Luna J, Roy C, Abderrahim H, Kirschenbaum F, Noguchi M, Smith D, Fukushima A, Hales J, Finer M, Davis C, Zsebo K, Jakobovits A. Functional transplant of megabase human immunoglobulin loci recapitulates human antibody response in mice. Nature Genetics Vol. 15, pp: 146-156 (1997); Jakobovits A. Mice engineered with human immunoglobulin YACs: A new technology for production of fully human antibodies for autoimmunity therapy. Weir's Handbook of Experimental Immunology, The Integrated Immune System Vol. IV, pp: 194.1-194.7 (1996); Jakobovits A. Production of fully human antibodies by transgenic mice. Current Opinion in Biotechnology Vol. 6, No. 5, pp: 561-566 (1995); Mendez M, Abderrahim H, Noguchi M, David N, Hardy M, Green L, Tsuda H, Yoast S, Maynard-Currie C, Garza D, BEMmill R, Jakobovits A, Klapholz S. Analysis of the structural integrity of YACs comprising human immunoglobulin genes in yeast and in embryonic sBEM cells. Genomics Vol. 26, pp: 294-307 (1995); Jakobovits A. YAC Vectors: Humanizing the mouse genome. Current Biology Vol. 4, No. 8, pp: 761-763 (1994); Arbones M, Ord D, Ley K, Ratech H, Maynard-Curry K, Otten G, Capon D, Tedder T. Lymphocyte homing and leukocyte rolling and migration are impaired in L-selectin-deficient mice. Immunity Vol. 1, No. 4, pp: 247-260 (1994); Green L, Hardy M, Maynard-Curry K, Tsuda H, Louie D, Mendez M, Abderrahim H, Noguchi M, Smith D, Zeng Y, et. al. Antigen-specific human monoclonal antibodies from mice engineered with human Ig heavy and light chain YACs. Nature Genetics Vol. 7, No. 1, pp: 13-21 (1994); Jakobovits A, Moore A, Green L, Vergara G, Maynard-Curry K, Austin H, Klapholz S. Germ-line transmission and expression of a human-derived yeast artificial chromosome. Nature Vol. 362, No. 6417, pp: 255-258 (1993); Jakobovits A, Vergara G, Kennedy J, Hales J, McGuinness R, Casentini-Borocz D, Brenner D, Otten G. Analysis of homozygous mutant chimeric mice: deletion of the immunoglobulin heavy-chain joining region blocks B-cell development and antibody production. Proceedings of the National Academy of Sciences USA Vol. 90, No. 6, pp: 2551-2555 (1993); Kucherlapati et al., U.S. Pat. No. 6,1075,181.

Antibodies can also be made using phage display techniques. Such techniques can be used to isolate an initial antibody or to generate variants with altered specificity or avidity characteristics. Single chain Fv can also be used as is convenient. They can be made from vaccinated transgenic mice, if desired. Antibodies can be produced in cell culture, in phage, or in various animals, including but not limited to cows, rabbits, goats, mice, rats, hamsters, guinea pigs, sheep, dogs, cats, monkeys, chimpanzees, apes.

Antibodies can be labeled with a detectable moiety such as a radioactive atom, a chromophore, a fluorophore, or the like. Such labeled antibodies can be used for diagnostic techniques, either in vivo, or in an isolated test sample. Antibodies can also be conjugated, for example, to a pharmaceutical agent, such as chemotherapeutic drug or a toxin. They can be linked to a cytokine, to a ligand, to another antibody. Suitable agents for coupling to antibodies to achieve an anti-tumor effect include cytokines, such as interleukin 2 (IL-2) and Tumor Necrosis Factor (TNF); photosensitizers, for use in photodynamic therapy, including aluminum (III) phthalocyanine tetrasulfonate, hematoporphyrin, and phthalocyanine; radionuclides, such as iodine-131 (¹³¹I), yttrium-90 (⁹⁰Y), bismuth-212 (²¹²Bi), bismuth-213 (²¹³Bi), technetium-99m (^(99m)Tc), rhenium-186 (¹⁸⁶Re), and rhenium-188 (¹⁸⁸Re); antibiotics, such as doxorubicin, adriamycin, daunorubicin, methotrexate, daunomycin, neocarzinostatin, and carboplatin; bacterial, plant, and other toxins, such as diphtheria toxin, pseudomonas exotoxin A, staphylococcal enterotoxin A, abrin-A toxin, ricin A (deglycosylated ricin A and native ricin A), TGF-alpha toxin, cytotoxin from chinese cobra (naja naja atra), and gelonin (a plant toxin); ribosome inactivating proteins from plants, bacteria and fungi, such as restrictocin (a ribosome inactivating protein produced by Aspergillus restrictus), saporin (a ribosome inactivating protein from Saponaria officinalis), and RNase; tyrosine kinase inhibitors; ly207702 (a difluorinated purine nucleoside); liposomes containing antitumor agents (e.g., antisense oligonucleotides, plasmids which encode for toxins, methotrexate, etc.); and other antibodies or antibody fragments, such as F(ab).

Those of skill in the art will readily understand and be able to make such antibody derivatives, as they are well known in the art. The antibodies may be cytotoxic on their own, or they may be used to deliver cytotoxic agents to particular locations in the body. The antibodies can be administered to individuals in need thereof as a form of passive immunization.

Characterization of extracellular regions for the cell surface and secreted proteins from the protein sequence is based on the prediction of signal sequence, transmembrane domains and functional domains. Antibodies are preferably specifically immunoreactive with membrane associated proteins, particularly to extracellular domains of such proteins or to secreted proteins. Such targets are readily accessible to antibodies, which typically do not have access to the interior of cells or nuclei. However, in some applications, antibodies directed to intracellular proteins may be useful as well. Moreover, for diagnostic purposes, an intracellular protein may be an equally good target since cell lysates may be used rather than a whole cell assay.

Computer programs can be used to identify extracellular domains of proteins whose sequences are known. Such programs include SMART software (Schultz et al., Proc. Natl. Acad. Sci. USA 95: 5857-5864, 1998) and Pfam software (BaBEMan et al., Nucleic acids Res. 28: 263-266, 2000) as well as PSORTII. Typically such programs identify transmembrane domains; the extracellular domains are identified as immediately adjacent to the transmembrane domains. Prediction of extracellular regions and the signal cleavage sites are only approximate. It may have a margin of error + or −5 residues. Signal sequence can be predicted using three different methods (Nielsen et al, Protein Engineering 10: 1-6,1997, Jagla et. al, Bioinformatics 16: 245-250, 2000, Nakai, K and Horton, P. Trends in Biochem. Sci. 24:34-35, 1999) for greater accuracy. Similarly transmembrane (TM) domains can be identified by multiple prediction methods. (Pasquier, et. al, Protein Eng. 12:381-385, 1999, Sonnhammer et al., In Proc. of Sixth Int. Conf. on Intelligent Systems for Molecular Biology, p. 175-182, Ed J. Glasgow, T. Littlejohn, F. Major, R. Lathrop, D. Sankoff, and C. Sensen Menlo Park, Calif.: AAAI Press, 1998, Klein, et. al, Biochim. Biophys. Acta, 815:468, 1985, Nakai and Kanehisa Genomics, 14: 897-911, 1992). In ambiguous cases, locations of functional domains in well characterized proteins are used as a guide to assign a cellular localization.

Putative functions or functional domains of novel proteins can be inferred from homologous regions in the database identified by BLAST searches (Altschul et. al. Nucleic Acid Res. 25: 3389-3402, 1997) and/or from a conserved domain database such as Pfam (BaBEMan et. al, Nucleic Acids Res. 27:260-262 1999) BLOCKS (Henikoff, et. al, Nucl. Acids Res. 28:228-230, 2000) and SMART (Ponting, et. al, Nucleic Acid Res. 27,229-232, 1999). Extracellular domains include regions adjacent to a transmembrane domain in a single transmembrane domain protein (out-in or type I class). For multiple transmembrane domains proteins, the extracellular domain also includes those regions between two adjacent transmembrane domains (in-out and out-in). For type II transmembrane domain proteins, for which the N-terminal region is cytoplasmic, regions following the transmembrane domain is generally extracellular. Secreted proteins on the other hand do not have a transmembrane domain and hence the whole protein is considered as extracellular.

Membrane associated proteins can be engineered to delete the transmembrane domains, thus leaving the extracellular portions which can bind to ligands. Such soluble forms of transmembrane receptor proteins can be used to compete with natural forms for binding to ligand. Thus such soluble forms act as inhibitors and can be used therapeutically as anti-angiogenic agents, as diagnostic tools for the quantification of natural ligands, and in assays for the identification of small molecules which modulate or mimic the activity of a BEM:ligand complex.

Alternatively, the endothelial markers themselves can be used as vaccines to raise an immune response in the vaccinated animal or human. For such uses, a protein, or immunogenic fragment of such protein, corresponding to the intracellular, extracellular or secreted BEM of interest is administered to a subject. The immogenic agent may be provided as a purified preparation or in an appropriately expressing cell. The administration may be direct, by the delivery of the immunogenic agent to the subject, or indirect, through the delivery of a nucleic acid encoding the immunogenic agent under conditions resulting in the expression of the immunogenic agent of interest in the subject. The BEM of interest may be delivered in an expressing cell, such as a purified population of breast tumor endothelial cells or a population of fused breast tumor endothelial and dendritic cells. Nucleic acids encoding the BEM of interest may be delivered in a viral or non-viral delivery vector or vehicle. Non-human sequences encoding the human BEM of interest or other mammalian homolog can be used to induce the desired immunologic response in a human subject. For several of the BEMs of the present invention, mouse, rat or other ortholog sequences can be obtained from the literature or using techniques well within the skill of the art.

Endothelial cells can be identified using the markers which are disclosed herein as being endothelial cell specific. Antibodies specific for such markers can be used to identify such cells, by contacting the antibodies with a population of cells containing some endothelial cells. The presence of cross-reactive material with the antibodies identifies particular cells as endothelial. Similarly, lysates of cells can be tested for the presence of cross-reactive material. Any known format or technique for detecting cross-reactive material can be used including, immunoblots, radioimmunoassay, ELISA, immunoprecipitation, and immunohistochemistry. In addition, nucleic acid probes for these markers can also be used to identify endothelial cells. Any hybridization technique known in the art including Northern blotting, RT-PCR, microarray hybridization, and in situ hybridization can be used.

One can identify breast tumor endothelial cells for diagnostic purposes, testing cells suspected of containing one or more BEMs. One can test both tissues and bodily fluids of a subject. For example, one can test a patient's blood for evidence of intracellular and membrane associated BEMs, as well as for secreted BEMs. Of particular interest in this context is the testing of breast duct fluid. Intracellular and/or membrane associated BEMs may be present in bodily fluids as the result of high levels of expression of these factors and/or through lysis of cells expressing the BEMs.

Populations of various types of endothelial cells can also be made using the antibodies to endothelial markers of the invention. The antibodies can be used to purify cell populations according to any technique known in the art, including but not limited to fluorescence activated cell sorting. Such techniques permit the isolation of populations which are at least 50, 60, 70, 80, 90, 92, 94, 95, 96, 97, 98, and even 99% the type of endothelial cell desired, whether normal, tumor, or pan-endothelial. Antibodies can be used to both positively select and negatively select such populations. Preferably at least 1, 5, 10, 15, 20, or 25 of the appropriate markers are expressed by the endothelial cell population.

Populations of endothelial cells made as described herein, can be used for screening drugs to identify those suitable for inhibiting the growth of tumors by virtue of inhibiting the growth of the tumor vasculature.

Populations of endothelial cells made as described herein, can be used for screening candidate drugs to identify those suitable for modulating angiogenesis, such as for inhibiting the growth of tumors by virtue of inhibiting the growth of endothelial cells, such as inhibiting the growth of the tumor or other undesired vasculature, or alternatively, to promote the growth of endothelial cells and thus stimulate the growth of new or additional large vessel or microvasculature.

Inhibiting the growth of endothelial cells means either regression of vasculature which is already present, or the slowing or the absence of the development of new vascularization in a treated system as compared with a control system. By stimulating the growth of endothelial cells, one can influence development of new (neovascularization) or additional vasculature development (revascularization). A variety of model screening systems are available in which to test the angiogenic and/or anti-angiogenic properties of a given candidate drug. Typical tests involve assays measuring the endothelial cell response, such as proliferation, migration, differentiation and/or intracellular interaction with a given candidate drug. By such tests, one can study the signals and effects of the test stimuli. Some common screens involve measurement of the inhibition of heparanase, endothelial tube formation on Matrigel, scratch induced motility of endothelial cells, platelet-derived growth factor driven proliferation of vascular smooth muscle cells, and the rat aortic ring assay (which provides an advantage of capillary formation rather than just one cell type).

Drugs can be screened for the ability to mimic or modulate, inhibit or stimulate, growth of tumor endothelium cells and/or normal endothelial cells. Drugs can be screened for the ability to inhibit tumor endothelium growth but not normal endothelium growth or survival. Similarly, human cell populations, such as normal endothelium populations or breast tumor endothelial cell populations, can be contacted with test substances and the expression of breast tumor endothelial markers and/or normal endothelial markers determined. Test substances that decrease the expression of breast tumor endothelial markers (BEMs) are candidates for inhibiting angiogenesis and the growth of tumors. In cases where the activity of a BEM is known, agents can be screened for their ability to decrease or increase the activity.

For those breast tumor endothelial markers identified as containing transmembrane regions, it is desirable to identify drug candidates capable of binding to the BEM receptors found at the cell surface. For some applications, the identification of drug candidates capable of blocking the BEM receptor from its native ligand will be desired. For some applications, the identification of a drug candidate capable of binding to the BEM receptor may be used as a means to deliver a therapeutic or diagnostic agent. For other applications, the identification of drug candidates capable of mimicking the activity of the native ligand will be desired. Thus, by manipulating the binding of a transmembrane BEM receptor:ligand complex, one may be able to promote or inhibit further development of endothelial cells and hence, vascularization.

For those breast tumor endothelial markers identified as being secreted proteins, i.e., extracellular, it is desirable to identify drug candidates capable of binding to the secreted BEM protein. For some applications, the identification of drug candidates capable of interfering with the binding of the secreted BEM it is native receptor. For other applications, the identification of drug candidates capable of mimicking the activity of the native receptor will be desired. Thus, by manipulating the binding of the secreted BEM:receptor complex, one may be able to promote or inhibit futher development of endothelial cells, and hence, vascularization.

Expression can be monitored according to any convenient method. Protein or mRNA can be monitored. Any technique known in the art for monitoring specific genes' expression can be used, including but not limited to ELISAs, SAGE, microarray hybridization, Western blots. Changes in expression of a single marker may be used as a criterion for significant effect as a potential pro-angiogenic, anti-angiogenic or anti-tumor agent. However, it also may be desirable to screen for test substances that are able to modulate the expression of at least 5, 10, 15, or 20 of the relevant markers, such as the tumor or normal endothelial markers Inhibition of BEM protein activity can also be used as a drug screen.

Test substances for screening can come from any source. They can be libraries of natural products, combinatorial chemical libraries, biological products made by recombinant libraries, etc. The source of the test substances is not critical to the invention. The present invention provides means for screening compounds and compositions that may previously have been overlooked in other screening schemes. Nucleic acids and the corresponding encoded proteins of the markers of the present invention can be used therapeutically in a variety of modes. BEMs can be used to stimulate the growth of vasculature, such as for wound healing or to circumvent a blocked vessel. The nucleic acids and encoded proteins can be administered by any means known in the art. Such methods include, using liposomes, nanospheres, viral vectors, non-viral vectors comprising polycations, etc. Suitable viral vectors include adenovirus, retroviruses, and sindbis virus. Administration modes can be any known in the art, including parenteral, intravenous, intramuscular, intraperitoneal, topical, intranasal, intrarectal, intrabronchial, etc.

Specific biological antagonists of BEMs can also be used to therapeutic benefit. For example, antibodies, T cells specific for a BEM, antisense to a BEM, interferance RNA to a BEM, and ribozymes specific for a BEM can be used to restrict, inhibit, reduce, and/or diminish tumor or other abnormal or undesirable vasculature growth. Such antagonists can be administered as is known in the art for these classes of antagonists generally. Anti-angiogenic drugs and agents can be used to inhibit tumor growth, as well as to treat diabetic retinopathy, rheumatoid arthritis, psoriasis, polycystic kidney disease (PKD), and other diseases requiring angiogenesis for their pathologies.

Mouse counterparts to human BEMs can be used in mouse cancer models or in cell lines or in vitro to evaluate potential anti-angiogenic or anti-tumor compounds or therapies. Their expression can be monitored as an indication of effect. Mouse BEMs can be used as antigens for raising antibodies which can be tested in mouse tumor models. Mouse BEMs with transmembrane domains are particularly preferred for this purpose. Mouse BEMs can also be ued as vaccines to raise an immunological response in a human to the human ortholog.

The above disclosure generally describes the present invention. All references disclosed herein are expressly incorporated by reference in their entireties. A more complete understanding can be obtained by reference to the following specific examples which are provided herein for purposes of illustration only, and are not intended to limit the scope of the invention.

Example 1

Function of BEM proteins was determined using bioinformatics tools. BEMs that are putative functional receptors with short cytoplasmic tails make particularly interesting targets.

Breast Tumor Endothelial Putative Functional Receptors with Short Cytoplasmic Tails Unigene ID Function OMIMID Protein Hs.181418 KIAA0152 gene product — 055545 Hs.25691 receptor (calcitonin) activity 605155 005847 modifying protein 3 Hs.9598 sema domain — BAB212835

Example 2

Protein kinases were identified among the BEMs. These are particularly good druggable targets, especially for small molecules.

Protein Kinases Unigene ID Function OMIMID Protein Hs.100009 cyclin-dependent 123828 kinase 3 Hs.143897 dysferlin, limb girdle 603009 NP_003485 muscular dystrophy 2B (autosomal recessive) Hs.184367 Ca2+-promoted Ras BAA25464 inactivator Hs.246857 mitogen-activated 602896 NP_620708 protein kinase 9 Hs.75087 FAST kinase 606965 NP-079372 Hs.296323 serum/glucocorticoid 602958 NP_005618 regulated kinase Hs.246857 mitogen-activated 602986 NP_620708 protein kinase

Example 3

Kinases with non-protein substrates were also identified. These similarly are believed to be exceedingly good druggable targets.

Kinases with non-protein substrates Unigene ID Function OMIMID Protein Hs.118625 hexokinase 1 142600 NP_277035 Hs.82689 tumor rejection antigen (gp96) 191175 NP_003290 1

Example 4

Growth factors were identified among the BEMs:

Growth factors Unigene ID Function OMIMID Protein Hs.91143 jagged 1 (Alagille syndrome) 601920 NP_000205 Hs.119206 insulin-like growth factor 602867 NP_001544 binding protein 7 Hs.1516 insulin-like growth factor 146733 NP_001543 binding protein 4 Hs.211573 heparan sulfate proteoglycan 2 142461 NP_005520 (perlecan) Hs.75111 protease, serine, 11 (IGF 602194 NP_002766 binding) Hs.8546 Notch homolog 3 (Drosophila) 600276 NP_000426

Example 5

Phosphatases, like kinases, are readily amenable to screening for inhibitors, especially small molecule inhibitors:

Phosphatases Unigene ID Function OMIMID Protein Hs.8997 heat shock 70 kDa protein 140550 NP_005336 1A/1B [Homo sapiens Hs.205353 ectonucleoside triphosphate 601752 NP_001767 diphosphohydrolase 1 isoform 1 [Homo sapiens] Hs.43666 protein tyrosine phosphatase 606449 NP_116000 type IVA 3 isoform 1 [Homo sapiens] Hs.6147 tensin-like C1 domain- — NP_056134 containing phosphatase isoform 1 [Homo sapiens]

Example 6

GPCRs were identified among the BEMs:

GPCRs Unigene ID Function OMIMID Protein Hs.17170 G protein-coupled receptor 4 600551 NP_005273

Example 7

The cellular location of the BEMs was determined to be either cytoplasmic, extracellular, membrane, or nuclear, as shown below.

Extracellular Proteins Unigene ID Function OMIMID Protein Hs.75415 Beta-2-microglobulin 109700 NP_004039 Hs.821 Biglycan 301870 NP_001702 Hs.172928 collagen, type I, alpha 1 120150 NP_000079 Hs.119571 collagen, type III, alpha 1 120180 NP_000081 (Ehlers-Danlos syndrome type IV, autosomal dominant) Hs.119129 collagen, type IV, alpha 1 120130 NP_001836 Hs.75617 collagen, type IV, alpha 2 120090 NP_001837 Hs.235368 collagen, type V, alpha 3 120216 NP_056534 Hs.159263 collagen, type VI, alpha 2 120240 NP_001840 Hs.78409 collagen, type XVIII, alpha 1 120328 NP_085059 Hs.278625 complement component 4B 120820 NP_000583 Hs.230 Fibromodulin 600245 NP_002014 Hs.211573 heparan sulfate proteoglycan 2 142461 NP_005520 (perlecan) Hs.1516 insulin-like growth factor 146733 NP_001543 binding protein 4 Hs.119206 insulin-like growth factor 602867 NP_001544 binding protein 7 Hs.49215 integrin-binding sialoprotein 147563 NP_004958 (bone sialoprotein, bone sialoprotein II) Hs.79339 lectin, galactoside-binding, 600626 NP_005558 soluble, 3 binding protein Hs.106747 likely homolog of rat and NP_067639 mouse retinoid-inducible serine carboxypeptidase Hs.365706 matrix Gla protein 154870 NP_000891 Hs.151738 matrix metalloproteinase 9 120361 NP_004985 (gelatinase B, 92 kDa gelatinase, 92 kDa type IV collagenase) Hs.699 peptidylprolyl isomerase B 123841 NP_000933 (cyclophilin B) Hs.75111 protease, serine, 11 (IGF 602194 NP_002766 binding) Hs.25338 protease, serine, 23 Hs.78224 ribonuclease, RNase A family, 180440 AAH05324 1 (pancreatic) Hs.111779 secreted protein, acidic, 182120 NP_003109 cysteine-rich (osteonectin) Hs.82085 serine (or cysteine) 173360 NP_000593 proteinase inhibitor, clade E (nexin, plasminogen activator inhibitor type 1), member 1 Hs.179573 TEM10, COL1A2 involved in 120160 NP_000080 tissue remodeling Hs.356624 TEM11, nidogen (enactin) 131390 NP_002499 Hs.5831 tissue inhibitor of 305370 NP_003245 metalloproteinase 1 (erythroid potentiating activity, collagenase inhibitor) Hs.82689 tumor rejection antigen (gp96) 1 191175 NP_003290

Membrane Proteins TM Orientation Unigene ID Function Protein Domains TM Location of N-terminus Hs.202 benzodiazapine receptor (peripheral) NP_000705 3 107-129, 78-100, OUT 133-155 Hs.76206 cadherin 5, type 2, VE-cadherin (vascular epithelium) NP_001786 1 598-620 Unsure Hs.122359 calcium channel, voltage-dependent, alpha 1H subunit NP_066921 19 1370-1392, 1614-1636, IN 1533-1555, 141-163, 915-937, 396-418, 1651-1673, 1745-1767, 990-1012, 234-256, 1430-1452, 1333-1355, 1680-1702, 855-877, 1295-1316, 826-848, 100-122, 1840-1862, 364-386 Hs.84298 CD74 antigen (invariant polypeptide of major NP_004346 1 49-71 IN histocompatibility complex, class II antigen-associated) Hs.1244 CD9 antigen (p24) NP_001760 4 59-81, 88-110, IN 12-34, 194-216 Hs.143897 dysferlin, limb girdle muscular dystrophy 2B NP_003485 1 2045-2067 Unsure (autosomal recessive) Hs.205353 ectonucleoside triphosphate diphosphohydrolase 1 NP_001767 1 477-499 IN Hs.17170 G protein-coupled receptor 4 NP_005273 5 55-77, 92-113, OUT 20-42, 225-244, 183-205 Hs.25549 hypothetical protein FLJ20898 NP_078876 3 102-124, 139-161, Unsure 168-190 Hs.277704 hypoxia up-regulated 1 NP_006380 1 13-35 IN Hs.76095 Immediate early response 3 NP_434702 1 123-145 Unsure Hs.265827 interferon, alpha-inducible protein (clone IFI-6-16) NP_075011 2 5-24, 44-66 IN Hs.91143 jagged 1 (Alagille syndrome) NP_000205 1 1069-1091 Unsure Hs.181418 KIAA0152 gene product NP_055545 1 271-290 OUT Hs.79356 Lysosomal-associated multispanning membrane NP_006753 5 63-85, 100-121, Unsure protein-5 142-164, 15-37, 184-206 Hs.77961 major histocompatibility complex, class I, B NP_005505 1 308-330 OUT Hs.277477 major histocompatibility complex, class I, C NP_002108 1 308-330 OUT Hs.110024 NADH: ubiquinone oxidoreductase MLRQ subunit NP_064527 1 20-42 Unsure homolog Hs.8546 Notch homolog 3 (Drosophila) NP_000426 3 1641-1663, 1496-1518, Unsure 20-42 Hs.107125 plasmalemma vesicle associated protein NP_112600 1 42-64 IN Hs.83974 solute carrier family 21 (prostaglandin transporter), NP_005621 12 256-278, 363-385, Unsure member 2 397-419, 100-122, 208-230, 326-348, 173-195, 514-536, 71-93, 557-576, 606-628, 25-47 Hs.125359 TEM13, Thy-1 cell surface antigen NP_006279 1 140-161 Unsure Hs.125036 TEM17 NP_065138 1 425-447 OUT Hs.9598 sema domain, immunoglobulin domain (Ig) BAB21836 1 727-794 OUT Hs.202 Benzodiazapine receptor (peripheral)-mitochondrial NP_00715 3 107-129, 78-100, OUT 133-155

Nuclear Proteins Unigene ID Function OMIMID Protein Hs.244 amino-terminal enhancer of 600188 split Hs.154029 bHLH factor Hes4 NP_066993 Hs.75450 delta sleep inducing peptide, 602960 immunoreactor Hs.75087 FAST kinase 606965 NP_079372 Hs.356668 guanine nucleotide binding 600874 NP_005265 protein (G protein), gamma 5 Hs.406410 H19, imprinted maternally 103280 BAB71280 expressed untranslated mRNA Hs.234434 hairy/enhancer-of-split 602953 NP_036390 related with YRPW motif 1 Hs.23823 hairy/enhancer-of-split NP_055386 related with YRPW motif-like Hs.15265 heterogeneous nuclear 607201 NP_005817 ribonucleoprotein R Hs.8728 hypothetical protein CAB61365 DKFZp434G171 Hs.240170 hypothetical protein MGC2731 NP_076973 Hs.146360 hypothetical protein MGC34648 NP_689873 Hs.337986 hypothetical protein MGC4677 NP_443103 Hs.197540 hypoxia-inducible factor 1, 603348 NP_001521 alpha subunit (basic helix- loop-helix transcription factor) Hs.75061 MARCKS-like protein 602940 NP_075385 Hs.246857 mitogen-activated protein 602896 NP_620708 kinase 9 Hs.79110 Nucleolin 164035 NP_005372 Hs.298229 prefoldin 2 NP_036526 Hs.250655 prothymosin, alpha (gene 188390 NP_002814 sequence 28) Hs.24950 regulator of G-protein 603276 NP_003608 signaling 5 Hs.76640 RGC32 protein Hs.3109 Rho GTPase activating protein 4 300023 NP_001657 Hs.337445 ribosomal protein L37 604181 NP_000988 Hs.197114 serine/arginine repetitive 606032 NP_057417 matrix 2 Hs.48029 snail homolog 1 (Drosophila) 604238 NP_005976 Hs.168357 T-box 2 600747 NP_005985 Hs.332173 transducin-like enhancer of 601041 NP_003251 split 2 (E(sp1) homolog, Drosophila) Hs.78465 v-jun sarcoma virus 17 165160 NP_002219 oncogene homolog (avian)

Cytoplasmic proteins Unigene ID Function OMIMID Protein Hs.184367 Ca2+-promoted Ras BAA25464 inactivator Hs.2575 calpain 1, (mu/l) large 114220 NP_005177 subunit Hs.100009 cyclin-dependent kinase 3 123828 Hs.31053 cytoskeleton-associated 601303 NP_001272 protein 1 Hs.82646 DnaJ (Hsp40) homolog, 604572 NP_006136 subfamily B, member 1 Hs.169476 glyceraldehyde-3- 138400 NP_002037 phosphate dehydrogenase Hs.77890 guanylate cyclase 1, soluble, 139397 NP_000848 beta 3 Hs.36927 heat shock 105 Kd NP_006635 Hs.1197 heat shock 10 kDa protein 1 600141 NP_002148 (chaperonin 10) Hs.8997 heat shock 70 kDa protein 1A 140550 NP_005336 Hs.180414 heat shock 70 kDa protein 8 600816 NP_006588 Hs.118625 hexokinase 1 142600 NP_277035 Hs.327412 Homo sapiens clone FLC1492 PRO3121 mRNA, complete cds Hs.833 interferon, alpha-inducible 147571 NP_005092 protein (clone IFI-15K) Hs.150580 putative translation NP_005792 initiation factor Hs.173737 ras-related C3 botulinum toxin 602048 substrate 1 (rho family, small GTP binding protein Rac1) Hs.119122 ribosomal protein L13a Hs.111611 ribosomal protein L27 607526 NP_000979 Hs.177592 ribosomal protein, large, P1 180520 Hs.12956 Tax interaction protein 1 NP_055419 Hs.251653 tubulin, beta, 2 602660 NP_006079

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We claim:
 1. A method of treating a breast tumor, comprising the step of: contacting cells of the breast tumor with an antibody, wherein the antibody specifically binds to an extracellular epitope of hairy/enhancer-of-split related with YRPW motif, whereby immune destruction of cells of the breast tumor is triggered.
 2. The method of claim 1 wherein the antibody is conjugated to a diagnostic or therapeutic reagent.
 3. The method of claim 1 wherein the breast tumor is multidrug-sensitive.
 4. The method of claim 2 wherein the reagent is a chemotherapeutic agent.
 5. The method of claim 2 wherein the reagent is a cytotoxin.
 6. The method of claim 2 wherein the reagent is a non-radioactive label.
 7. The method of claim 2 wherein the reagent is a radioactive compound.
 8. The method of claim 1 wherein the breast tumor is in a human. 